Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 63, NWS Melbourne, FL

June 15, 20114 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 15, 2011, 4:46 PM EDT for 4 counties in Florida. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 15, 2011, 4:46 PM EDT (20:46 UTC)
Expired: Jun 15, 2011, 5:32 PM EDT
In force: 46 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Brevard County, FL, Indian River County, FL, Okeechobee County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 42 km from the middle of the area, began a volume at 20:45 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 1:52 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.8 hours before the alert went out and 84 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1201 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

083 
WUUS52 KMLB 152046
SVRMLB
FLC009-061-093-097-152145-
/O.NEW.KMLB.SV.W.0063.110615T2046Z-110615T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
446 PM EDT WED JUN 15 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BREVARD COUNTY IN FLORIDA
  WESTERN INDIAN RIVER COUNTY IN FLORIDA
  NORTH CENTRAL OKEECHOBEE COUNTY IN FLORIDA
  SOUTHEASTERN OSCEOLA COUNTY IN FLORIDA

* UNTIL 545 PM EDT.

* AT 441 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BLUE CYPRESS LAKE...AND MOVING SOUTHWEST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  YEEHAW JUNCTION

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

&&

LAT...LON 2764 8051 2755 8078 2777 8105 2799 8075
      2782 8054
TIME...MOT...LOC 2046Z 027DEG 26KT 2773 8075

$$


MOSES

1 follow-up statement

797 
WWUS52 KMLB 152132
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
532 PM EDT WED JUN 15 2011

FLC009-061-093-097-152142-
/O.CAN.KMLB.SV.W.0063.000000T0000Z-110615T2145Z/
OKEECHOBEE-OSCEOLA-INDIAN RIVER-BREVARD-
532 PM EDT WED JUN 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BREVARD...WESTERN
INDIAN RIVER...SOUTHEASTERN OSCEOLA AND NORTH CENTRAL OKEECHOBEE
COUNTIES IS CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A
RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND
DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR EAST CENTRAL FLORIDA.

LAT...LON 2764 8051 2755 8078 2777 8105 2799 8075
      2782 8054
TIME...MOT...LOC 2132Z 027DEG 26KT 2743 8092

$$
BOWEN

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 14, 9:26 PM EDT	Special Weather Statement	MLB	Orange	49 min
Jun 15, 2:14 PM EDT	Special Weather Statement	MLB	Lake	46 min
Jun 15, 2:18 PM EDT	Special Weather Statement	MLB	Seminole	42 min
Jun 15, 2:44 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	46 min
Jun 15, 2:52 PM EDT	Special Weather Statement	MLB	Brevard	38 min
Jun 15, 3:08 PM EDT	Special Weather Statement	MLB	Orange	37 min
Jun 15, 3:15 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	34 min
Jun 15, 3:29 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola	61 min
Jun 15, 3:46 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Indian River	59 min
Jun 15, 4:34 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Okeechobee, Saint Lucie	56 min
Jun 15, 5:20 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Okeechobee, Saint Lucie	55 min
Jun 15, 5:34 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee	38 min
Jun 15, 6:18 PM EDT	Special Weather Statement	MLB	Martin	42 min
Jun 15, 7:13 PM EDT	Special Weather Statement	MLB	Lake	62 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.